What is the maximum distance allowed between the external lightning conductor and the structural steel?

The maximum distance allowed between the external lightning conductor and the structural steel is set to ensure effective energy transfer during a lightning strike. When a lightning event occurs, it is critical that the lightning's energy is conducted safely to the ground, minimizing the risk of damage to the structure and providing a path that preserves the integrity of the building.

In this context, a distance of 100 feet between the lightning conductor and structural steel is established based on safety standards and engineering principles. If the distance exceeds this limit, the effectiveness of the lightning protection system can be compromised. Increased distances can lead to a higher impedance path, which may result in potential differences that can create hazardous conditions for the building and its occupants.

This guideline underscores the importance of maintaining adequate connection specifications in lightning protection systems to ensure their effectiveness, highlighting safety as a primary goal in the design of such installations.